Review for United States English Spellchecker by Mike
Rated 1 out of 5 stars
MAJOR problem in Mozilla 3.5.2:
The dictionary keeps on disappearing from "[Contextual menu] > Languages"
Whoever knows how to solve this please see several reports in the bug report pages.
NB: Other dictionaries seem to have the same problem.
To create your own collections, you must have a Mozilla Add-ons account.